Point is, I don't think there's ever been an incident of anybody walking into a shopping mall and beating a dozen people to death with their fists.Snark aside, physical violence (ie punching/kicking) is more common on school grounds, then gun shootings. Shootings get attention because they often kill.
U.S. schools - physical fights among students, by ethnicity 2019 | Statista
And yeah, (snark aside), if anything, sports --- even violent sports like football, boxing, wrestling, etc, -- help kids develop qualities that would would probably make them less likely to go off the rails like that.
One thing most mass shooters seem to have in common is that they're socially isolated, and emotionally repressed.
Most jocks aren't.